Machinery fob setting and filing saws



CHARLES LAFFERTEY, OF YORK SPRINGS, PENNSYLVANIA.

MAGHINEEYV Eon SETTING ANDFILTNG sAWs.

Specification of Letters Patent No. 5,249, datedy August 21, 1847.

To all whom t may concern Be it known that I, CHARLES LAEFERTEY, of York Springs7 in the county of Adams and State of Pennsylvania, have'invented new and useful Improvements in Saw Sete ting and Filing Apparatus, and that the following is a full,- clear, and exact description vof the principle or characterwhichldistinguishes them from'all other things before known and of the manner of making, construct-ing, and using the same, reference being had to the accompanying drawings, making part of this specification, in` which- Figure l is a side elevation ofthe apparatus; Fig. 2, a front viewy of the ilefand. its guide detached; Fig. 3, a front view of the saw set; Fig. 4, is the tool for setting the saws; and Figs. 5 and 6 are modifications of the instrument for circular saws.

The same letters indicate like parts in all the gures.

The nature of my invention consists in the construction and arrangement of the clamp for holding the saw for setting and ling and in combining therewith a guide for the file and a gage and tool for setting the teeth.

The construction of my machine is as follows: The principal parts are formed of two v castings (a, a) in the form of flat plates,

the ends of which are turned inward as is clearly shown in Fig. l; in the middle of these plates therev are joints (b) by which they are connected, thus forming a clamp in which a saw blade (c) can be held at either end, as will be hereafter more fully described. The end of theclamp for ling saws, which is shown uppermost in Fig. 1, has its jaws rounded off like a vice, and between them the saw is pinched andy heldv firm while being led by means of a bent lever (d) which passes through a narrow slit (e) (Fig. 3,) in the front plate; that part of said lever which is `between `the plates is curved downward as clearly shown in Fig. l; a pin (f) is put through the lever projecting on each side which bears against the'inside of the front plate on eachside of the slit (e) and forms a fulcrum. When the outer end of this lever is borne down it will obviously spread the` plates (a, a) be-v low their joint (b) and cause their upper jaws to pinch whatever is held between them; to hold the lever in this position a c pawl (g) is jointed to the lever and extends up to the plate (a) on the face of which notches are cut for it' to take into to brace ling reversed for that purpose.

down thelever. Aloop/ y(it) yis aflixed the back plate (a) of myapparatus whichV slips ont-othe end of an upright post by which the clamp is firmlyy held in proper,V position. vFrom thenfront plate "(a) nearythe upper end in rFig. l two arms project; f i these may be keyed in so as to "be removable which willv be found a great conveniencein packing the apparatus; these arms support a shaft (Z) parallel with, vand at a proper` which acollar (m) slides. To this collar is attached a plate (n) on the. upper 'sideA on which *ya second plateto) is pivoted; this plate..V (jo) has .a lpointer on vitthat;` ,turns to an index plate (n) and to it is attacheda short standard (p) to which is jointed a socket piece (g), in the upper end of which there is a socketfor the reception of the le holder (1'). The pin of the file holder `distance below the jawsv of the clampon which enters the socket has an oblong hole l in its upper end through which the pin passes that attaches it to the cross head of the file holder, the length of this slot regurlates the depth to which the le is to go. A

set screw (s) confines the collar (m) on the shaft (Z) while one tooth is filed, and the plate (o) is turned to any angle (as indicated on the index v(n) of the lower plate (71.)), that the file is required to move in.

^ By kthis apparatus constructed as above set forth saws can be filed to any `form required even by the most unpractised hand. For setting the saw teeth the opposite end of the clamp is turned up, as shown in Fig. 3; the jaw (a) of this end of the clamp is extended up abovethe front jaw (a) and its face is inclined as shown at (t) (see Fig. l) ;y on this face there is a gage plate (u) that is held up by springs in the jaw which are shown by dotted lines in Figs. 1 and 2; on

the face is marked a series of horizontal lines l, 2, 3, &c., to either of which thev gage plate (a) is set by its set screw (o), (see Fig. 1) according to the width the teeth are to be set. The saw is held between the jaws of the clamp in a similar manner to that employed in the other end and the lever be- The tool for sett-ing the teeth is shown in Fig. l and also (fw) Fig. 3; it is a plain lever vwith a hook at one end having a set screw in the bend of the hook, and a tooth or stud (y) projecting from the face of the lever at a proper distance from the hook.A The application of this tool isas follows AThe hook is caughtover-theupper edge of the projection (t) on the-jaw (a) which brings the tooth or Vstud ona' line with the upper point ofthe tooth of the saw` to be set which is nicely adjusted by the set screw then by bearing against the lever (fw) the tooth isbent against the face of the inclined part ofthe jaw and set, the lever is then slipped to the neXt tooth to be acted on,`*and` the process repeated the whole length ofthe jaw, the saw is then' slipped along for a further action of theset and so onto ythe endl The tooth or stud (y can bechanged for another sized one, it eing fastened into the leverby a set screw (e). Figs. 5 and-6 are mere modications 'of the same machine to adapt it to the circular saw; as the changes are perfectly obvious no detailed description of them is deemed necessaryf' What I5 claim asmy invention and desire to secure by Letters Patent is 1 1. Constructing asaw set in the manner described by having one jaw raised above the'other andA beveled` on the face, with `a rib behindv asA described,l by `which the teeth are set by a toothed lever that hooks over said `rib and'brings lthe tooth against the teeth of the saw, as above specified,-the width-of the set of the teeth being deter- Vmined by the gage, substantially in the mannerand for the'purpose set forth.

2. I also claim the ling apparatus, constructed substantially as herein made known, consisting of a file? holder consisting of a standard that slidesparallel in front ofthe jaws ofthe clamp `to which the file `is so attached as to have'a free motion horizontally in any direction to which `it is `set andfso regulated vas to lefto any given depth "the holder is set torso-that it will direct the tile to the proper angle and depth on thelsaw, in

themanner and forthepurpose above specix t f Y i .i CHARLES' LAFFERTEYQ V'-Witu'esses: l '1 i J. J; GREENOUGH,

` A. Pi fBRowNE; i Y 

